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L-605™ • UNS R30605

L-605 is a nonmagnetic cobalt-based chromium-tungstennickel alloy that has excellent corrosion and oxidation resistance, and high strength at both room and elevated temperatures. Through work hardening, high strength levels can be obtained. L-605 has a minimal heat treatment response, but can be used in the cold worked and aged condition. Applications include medical implant devices, springs, valves, and engine components for the aerospace industry. As a result of its high tungsten content, L-605TM is radiopaque, which is beneficial for implant devices

Because of the alloy’s high work hardening rate, only minimal reductions can be taken before solution annealing will be required. L-605TM is very resistant to oxidation and scaling at elevated temperatures, and is nonmagnetic in all conditions. L-605 is produced by vacuum induction melting followed by electroslag remelting (VIM-ESR), and as such, has a low nonmetallic inclusion level.

Available Sizes:

L-605 is available from Hamilton Precision Metals as strip product. Contact HPM Sales Department for size capability information. The material corresponds to UNS R30605.

Nominal Composition
Nickel 10%
Tungsten 15%
Chromium 20%
Iron 3.00% Max
Manganese 1.5%
Carbon 0.10%
Silicon 1.00% Max
Cobalt Balance

Mechanical Properties
Ultimate Tensile Strength 165,000 PSI
Yield Strength (0.2% Offset) 85,000 PSI
Elongation in 2”+ 30%
Hardness 91 HRb
Modulus of Elasticity 35.3 X 10^ 6 PSI

+The measured elongation will be less as thickness decreases to 0.003” and less
These values may be adjusted by control of process variables – consult HPM for desired values.

Physical Properties
Density 0.330 lbs/
Melting Point (Approx.) 2500°F
Electrical Resistivity @ R.T. 88.7 Microhm·cm
Thermal Expansion Coefficient (RT to 200°C) 12.9 PPM/°C
Thermal Conductivity @ R.T. 12.7 W/m·K

Typical values to guide alloy selection but are not a guarantee of minimum or maximum.